名词
中文翻译：警告信号同义词
同义词：
['warning signal', 'cautionary signal']
例句：
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1. When driving at night, it's important to be aware of the caution signal.
在夜间驾驶时，要注意注意警告信号。
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2. The traffic police issued a caution signal when they saw the car approaching.
当警察看到那辆车靠近时，发出了警告信号。
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3. The driver ignored the caution signal and drove through the red light.
司机忽略了警告信号，闯红灯行驶。